Pole-jack



W. B. TEMPLETON.

POLE'JACK.

APPLICATION man MAR. 4, 191s.

Patenfe De@ 23,1919.

2 SHEETS-SHEET l.

W. B. TEMPLETON.

POLE JACK.

v APPLICATION FILED MAR. 4, i918.

Patented Dec. 23,1919.

2 SHEETS-SHEET 2.

WALTER B. TEMPLETON, 0F CHICAGO, ILLINOIS.

POLE-J' ACK.

To all whom t may concer/n:

Be it known that I, WALTER B. TEMPLE- TON, a citizen of the UnitedStates, residing at Chicago, in the coun-ty of Cook and State ofIllinois, have invented certain new and useful Improvements inPole-Jacks, of which the following is a specification.

This invention rela-tes to improvements in that class of liftingappliances commonly known as jacks, and has reference more particularlyto a type and construction of jack especially designed and adapted forthe pulling and straightening of telegraph and telephone poles, heavyposts, and generally simi1 lar articles.

The jack of my present invention is of the pivoted base variety wherebyit is adapted to operate at a greater cries. inclination from thevertical; and among the salient objects of the invention are, to providea powerful and dependable implement by Which poles can 4be quickly,cleanly and safely pulled from their settings without requiring anypreliminary digging or loosening of the ground, to provide such animplement which can with equal effectiveness 'be used for straighteningpoles, posts, buildings and the like that, from wind storms or othercauses, have become dangerously inclined or bent from their trueposition, to provide an implement of the character mentioned capable ofbeing manipulated by a singleoperator, and to provide an implementwhich, while primarily designed for and adapted to the pole pulling andstraightening` functions above mentioned, shall also be capable ofperforming the direct raising functions of an ordinary lifting jack.Other and more specific objects are, to provide an improved head for thelifting-bar adapted both to receive and securely hold a chainhitch forpulling a pole and to eect a strong and secure bite in the surface of apole when used to straighten the latter and to provide an improvedportable non-slipping base or cribbing adapted to afford a secureanchorage or rest for the lower end of the tool.

Still other objects and advantages of the invention will be apparent tothose skilled in the art as the invention becomes better understood fromthe following detailed description, taken in connection with theaccompanying dra-wings wherein I have illus- Specification of :PettersPatent.

Patented Dec. 23, 1919.

Application-filed March 4, 1918. Serial No. 220,121.

trated one practical and approved embodiment of the invention, and inwhich-.-

Figure 1 is a side elevation, showing the Jack employed in raising apole out of the ground.

Fig. 2 is a similar View, showing the jack employed in straightening aninclined or canted pole. A

Fig. 3 is an enlarged fragmentary detail, in vertical section throughthe casing, showing the structure and relative arrangement of thelifting and dogging pawls at the beginning of a lifting stroke.

Fig. 4 is a view. similar to Fig. 3, but showing in full lines thelifting pawl retracted into engagement with the lower end of the doggingpawl preliminary to disengaging the latter from the liftingbar, andshowing in dotted lines a further retracted position of both pawls inwhich the liftingbar is free to descend, and both pawls are nutuallylocked out of engagement with the atter.

Figs. 5. 6 and 7 are rear, front and top plan views respectively of thehead or cap of the lifting-bar; and

Fig. 8 is a perspective detail of the portable base or foundationmember.

Referring to the drawings, 10 designates the permanent b-ase or pedestalof the jack, to which is pivoted at 11 the frame or casing 12 formedwith a slideway for the lifting-bar 13, the latter having the usualratchet-tooth for-mation 14 on one edge thereof. The lever socket piececomprises two integral sockets 15 and 16 inclined to each other, theupper socket 15 being designed to receive the handle lever 17 when thetool is used in a vertical or approximately vertical position, as shownin Fig. 1, and the lower socket 16 receiving the handle lever when thetool is used in a considera'bly inclined position, as shown in F ig. 2.The socket lpiece is pivoted between the sides of the frame on trunnions18 as usual, and carries at its forward end the lifting pawl 19 pivotedthereto at 20. A spring 21 secured to the frame at 22 presses against alaterally projecting pin 23 carried by the pawl 19 and urges the nose ofthe latter into engagement with the teeth of the lifting bar 13, asshown in Fig. 3. Pivoted to the sides of the casing at 24 is a forkeddogging'pawl, the arms 25 of verse member 26 of -which normally engagesthe teeth of the lifting-bar under the gravity effect of the pawl. Atthe rear of the lower end of this pawl is an extension?? that projectsthrough a slot 28 in the rear wall of the casing and forms a finger-holdby which the (logging pawl can be manually retracted Whenever it may benecessary or desirable toeffect a gradual lowering of the load.Extending across the under side of the dogging pawl is a shoulder 29that coperates with the nose of the lifting pawl 19, as shown in Fig. 4,to force the dogging awl out of engagement with the lifting- Ear whenthe latter is under load and to lock both pawls disengaged from thelifting-bar to ermit the full descent of the latter.

n the upper end of the lifting-bar is a head or cap shaped to provide aair of upstanding prongs 30 of gradually lncreasing width toward theirupper ends, forming between them a relatively deep slot 31 extendingfromv front to rear of the head. The upper forward edges 32 of theprongs 30 are made comparatively sharp so as to readily indent or biteinto the side of a pole, such as that shown atA in Fig. 2, or otherobject that is to be straightened up from an inclined or partiallyfallen position, and prevent slipping' of the tool on the object whenpower is applied. To further adapt the head to receive and securely holda lifting chain for a pole-pulling operation, such as is pictured inFig. 1, the rear inclined faces of the prongs 30 are hollowed out orconcaved as shwn at 33 in Figs.

Vand 7 and their front faces are also beveled or chamfered, adjacent tothe sides of the slot 31, as indicated at 34 in Figs. 6 and 7. Anedgewise standing link-of an ordinary oval link chain 35 lies within theslot 31,A

.while'the adjacent ends of the two links at either end thereof registerwith and abut against the concave and chamfered surfaces 33 and 34respectively, lso that the chain is neatly fitted and strongly securedto the head in such a manner as to resist tensional strain on the chainand prevent its slippingon the head. The lower end of the cham beinglooped around a pole B (Fig. 1) at 35',

an enormous lifting effect can be exerted and a heavy pole completelyextracted from its setting in a few moments time. To the lower end 'ofthe frame or casing is pivoted at 36 a depending locking pawl 37, theJnose of which, when the frame is normal toits basefor pedestal 10engages beneath a catch 38 integral with the base and securely locks theframe rigid with and normal to the latter. On the back of the lockingpawl 37 is a linger-hold 39 by which vthe pawl may readilybe disengagedwhen the jack is to be used in tilted position, as shown Fig.

www...

2. Pivoted handles 40 on either side of the frame, and a rearwardlyextending 'horn 41 at its upper end, facilitate the manualtransportation of the tool and the positioning of the same` for work.

In order to' insure an adequate'non-sinking and non-slipping rest orfoundation for the lower end lof the tool when used on comparativelysoft ground,A I lprovide an I-beam section 42 of a length considerablyexceeding the width of the permanent base or pedestal 10, as shown inFig. 8, and of a width -between flanges equal to the length of thelatter so as to easily accommodate the same between itsflanges, as shownin Figs. 1 and 2. Under. the downward stress exerted by the tool thelower flanges of this I-beam section sink into the ground and firmlyanchor it against slipping, while its broad web resting on the surfaceof the ound prevents it from sinking therein. he upstanding flangesprevent fore and aft-slipping of the permanent base 10 of the tool linan obvious manner. To prevent slipping of the permanent base 10 insituations where it may not be possible or practicable to employ theauxiliary base or foundation member 42, I preferably provide the base 10with a hole 43 extending from top to bottom thereof through which a pegmay be driven into the ground to pin it in place.

It is believed that the foregoing description, taken in connection withthe drawings, and particularly Figs. 1 and`2 of the latter, will makeclear to those familiar with tools of this generalcharacter thestructural features, uses and advantages of the viou'sly be used toaccomplish' the-usual and 110 ordinary functions of a lain lifting orraising jack. When used or pulling poles no preliminary excavating orloosenmg of the earth around the base of the ole is requircd. The I-beambase is set on t e ground 11B 4b eside the pole, the jack set upon 1t,the

chain slung around the pole, the upper end of the chain dropped in theforked and recessed head or cap of the lifting-bar, and the leveroperated until the pole is out of the ground. When used forstraightening a pole, the I-beam base is set on the ground a littledistance from the pole on the side toward which the latter leans, thejack set upon it, the latch-hook 'at the heel released, 125 the jacktilted forwardly vandthe prongs of the cap dented into the side oftheole, and the `leveroperated until the po e is forced to the exactposition or rake required. The ground is then freshly tamped aroundsioned, or both, and the-jack is then released These operations :canreadily 'bo performed by a singlev operator.

The jack herein shown is single-acting, and to release the lifting-barwhen under stress of the load and permit `it to descend, with theclogging pawl holding the load the handle lever is raised slightly, thelifting pawl drawn backwardly by grasping the pin 23 until' its noseengages behind shoulder 29, and then, by lowering the handle lever, theclogging pawl is forcedout of engagoment with the teeth yof thelifting-bar,

and -both pawls assume the positions shown in dotted lines in Fig. 4 inwhich they mutually lock each other disengaged from the lifting-bar,leaving the latter free to drop, until the handle lever is again raisedwhen they at once resume their normal functions. By manual manipulationof the dogging pawl, through linger-grip 27, the lifting-bar can belowered under load under zhe control of the lifting pawl and handleever.

It is evident that the implement herein shown and described is capablel-of being modified in details without altering its essential structuralor functional characteristics or capabilities or sacrificing theadvantages inherent therein. Hence, I do not limit the invention totheprecise embodiment of the invention here presented for purposes ofillustration and disclosure but reserve all such variations,lmodifications and mechanical equivalents as fall within the scope andpurview gf thev appended claims.

I claiml. In a pole pulling and straightening jack, the combination of abase, a frame pivoted on said base to tilt forwardly, and a lifting-barslidably mounted in said frame and formed with a head having a slotextending from front to rear thereof, said slot opening through theupper end of said head and its bottom wall forming a seat tosupportingly engage with a link of a chain set edgewise in said slot.

2. In a pole pulling and straightening jack, the combination of a base,a frame pivoted on said base to tilt forwardly, and a lifting-barslidably mounted in said frame and formed with a head having a slotextending from front to rear thereof, said slot opening through theupper end of said head and formed withA a forwardly and downwardly7inclined bottom wall constituting a seat to supportinglyY engage with alink of a chain set edgewise in said slot.

3. In a pole pulling and straightening jack, the combination of a base,a frame pivoted on said base to tilt forwardly, and a lifting-barslidably mountedin said frame and formed with a head having a slot e2;-

-pivoted on said base,

tending from front` to rear thereof, vsaid slot opening through theupper end of said head and formed with a forwardly downwardlyinclinedbottom wall constitutving a seat to supportin 1 en age within gy. g

ink of a chain set edgewise 1n said slot and and said head beingconcaved on its rear si e on a lifting-bar slidably mounted in saidframe and formed with a head having aslot extending from front to rearthereof, said slot vopening through the Au perend of said head andformed with a orwardly and downwardly inclined bottom wall constitting'aseat to supportingly engage with a link of a.-

chain set edgewise in said slot, and said head being conca ed on bothits front and rear sides on bot sides of said slot to form abutments forthe adjacent ends of adjacent links of said chain.

5. In a pole pulling and straightening appliance, the combination of abase, a frame articulated to said base, a lifting-bar slidablv mountedin said frame and formed with a head having a vertical slot openingthrough the upper end of said head and formed with a forwardly anddownwardly inclined bottom wall, and a chain having a link thereofseated edgewise in said slot and supported on said inclined wall and ade-4 pending portion lying in front of said lifting-bar and frame andformed with a loop at its lower end adapted to embrace the pole to bepulled.

6. In a pole nulling and straightening jack, the combination of a base,a frame and a lifting-bar slidably mounted in said frame and providedwith a head having a pair of upstanding prongs with sharp upper edgesand a chainseating slot between said prongs.

7. In a pole pulling and straightening jack, the combination of a base,a frame pivoted on said base, and a lifting-bar slidably mounted in saidframe and formed with an integral head having apair of upstanding prongsof gradually increasing width toward their upper ends, said prongshaving sharp upper edges, and said head having a narrow slot betweensaid prongs adapted to seat a link of a chain set edgewise therein.

8. In a pole pulling and straightening appliance, the combination with ajack having a base and a frame pivoted on said base to tilt forwardly,of an I-beam section forming a non-slipping rest or foundation Vfor thebase of said jack.

9. In a pole pulling appliance, the combination with a jack havandstraightening I sides of said slot to forman abutment for the adjacentend to tilt forwardly, of an beam section forming a non-slipping rest orfoundatlon for the base of said lack, said Lbeam section having a lengthexceeding the width of said jack base, and a width etween its iangesSubstantially equal to -the length of saidi jack base.

10. I n a jack, the combination of a base, a frame pivotally mountedon'said base, and a socket-piece fulcruined in said frame, saidsocket-piecefbeing formed with a plurality of handle-engaging sockets.

,11. In a ack, the combination of a base,

a frame pivotally' mounted on lsaid base mesma-. s.,

so as to tilt forwardly, and a soelsret-.piecey fulcrumed in said frame,said socket-piece' being formed with a air of rearwardlyy di-i vergenthandle engaging sockets.

12. In a 'ack, the combination of a base,

a frame pivotally mounted on said base so as to tilt forwardly,releasable means for locking said frame rigid with said base, .and asocket-piece pivoted in said frame and formed with'a pair of rearwardlydivergent upper and lower handle engaging sockets, the upperof saidsockets adapted for use when-said locking means is operating and thelower when it is idle;

. WALTER B. TEMPLETON.

